Today I would like to talk about Retry pattern. In distributed applications, where constant communications are made between services and/or external resources, temporary or transient failures (transient failures) can occur when interacting with these environments. These failures can be caused by different reasons, among the most common are the momentary losses of connection to the network, temporarily unavailable services, exceeded response times, etc.
Normally these errors are solved automatically and in a short period of time so that if the service or resource is invoked, it immediately responds correctly. A classic example of a transient error is the failure to connect to the database due to a peak of simultaneous connections that exceed the maximum number allowed per configuration.